Jaguar Repair: Cruise Control 1986 Series 3, brake light switch, fuse panel

Question
Hello Howard,Iwondered if you could help me before I need to take my Jag into a srevice agent.The cruise control has just stopped working,checked all main fuses,unless there is a hidden one some where,it is the last of the series 3 1986 new New Zealand done 30.000 miles.

Answer
Hi Dave,
Two fuses are used, one is the fuse #11 in the main fuse box which operates the brake lights. The other is fuse #12 in the main fuse box.
Two brake switches are used, the brake light switch (lever type) and a smaller push switch. The other switches used are the master switch on the rear of the shift console and an inhibit switch inside on the shift mechanism. A set switch is on the turn signal lever. The ECU is mounted near the secondary fuse panel. The signal comes to the ECU form the speedometer pulse generator by a yellow wire to the ECU plug. Also confirm that you have vacuum at the actuator.
Howard